I really need help on these problems. Please help me.

18. Circle the words that correctly describe each graph. inverse is a function odd even a function inverse is a function odd even b. function inverse is a function odd even C. function a b 19. State the intervals on which graph (a) above is increasing, decreasing, concave up, and concave down. Increasing: Decreasing: Concave up: Concave down: 20 Given log A = 3.5, log B = -1.6, log C =0.4, evaluate log (Avc 21. Solve. ( m2 - 2) 2 - 2 (m2 - 2) - 63 = 0